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首页> 外文期刊>Environmental Science & Technology >Spatial and Temporal Trends of Perfluoroalkyl Substances in Global Ocean and Coastal Waters
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Spatial and Temporal Trends of Perfluoroalkyl Substances in Global Ocean and Coastal Waters

机译：全球海洋和沿海水域全氟烷基物质的空间和时间趋势

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摘要

Per- and polyfluoroalkyl substances (PFAS) have been widely detected in global surface waters since the early 2000s. Here, we have compiled and analyzed the published data for perfluorocarboxylates (PFCAs) and perfluorosul-fonates (PFSAs) in surface waters of coastal seas, the Great Lakes, and open oceans to examine temporal and geospatial trends. Mass discharges from major rivers were also estimated. A large number of measurements of individual PFAS have been made in these surface waters (29 500 values), with seven C4-C10 PFSAs and nine C4-C12 PFCAs accounting for 83% of all data. However, most results (85% for PFSAs; 80% for PFCAs) were for the coastal seas of Western Europe, China, Korea, and Japan, while results were limited for coastal North America and lacking for South America and Africa. Highest median concentrations of PFCAs and PFSAs were reported in the Bohai and Yellow Seas region of China as well as in the North and Baltic seas in Europe. Significant declines in median PFSAs and C7-C12 PFCAs were also observed for the period 2012-2018 in these same regions, and for 2004-2017 in the Great Lakes. Mass discharge estimates indicated continued substantial riverine emissions of long chain (C7-C12) PFCAs in the period 2015-2019 for the coastal seas of China and reductions in emissions for Western European rivers compared to earlier time periods.
机译：自2000年代初以来，全球表面水域已广泛检测到每氟氟烷基物质（PFA）。在这里，我们已经编制并分析了沿海海，大湖和开放海洋的地表水域的全氟羧酸盐（PFCAS）和全氟族族（PFSAS）的公布数据，以检查时间和地理空间趋势。还估计了主要河流的大规模排放量。在这些表面水域（29 500值）中已经制造了大量测量单个PFA，七C4-C10 PFSA和九个C4-C12 PFCAS占所有数据的83％。然而，大多数结果（PFSA的85％; PFCA的80％）是西欧，中国，韩国和日本的沿海海洋，而结果对于沿海北美和缺乏南美洲和非洲的结果。在中国的渤海和黄海地区以及欧洲的北部和波罗的海中报道了最高的PFCA和PFSA的浓度。在这些相同地区的2012-2018期间也观察到中位数PFSA和C7-C12 PFCA中的显着下降，并在大湖中持续2004-2017。大规模排放估计表明，2015 - 2019年沿海海洋期间的长链（C7-C12）PFCA的持续大量河流排放，与较早的时间段相比，西欧河流的排放减少。

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